Introduction of protonated sites on exfoliated, large-area sheets of Hexagonal Boron Nitride

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dc.contributor.author Jasuja, Kabeer
dc.contributor.author Ayinde, Kayum
dc.contributor.author Wilson, Christina L.
dc.contributor.author Behura, Sanjay K.
dc.contributor.author Ikenbbery, Myles A.
dc.contributor.author Moore, David
dc.contributor.author Hohn, Keith
dc.contributor.author Berry, Vikas
dc.date.accessioned 2018-09-28T07:03:10Z
dc.date.available 2018-09-28T07:03:10Z
dc.date.issued 2018-09
dc.identifier.citation Jasuja, Kabeer; Ayinde, Kayum; Wilson, Christina L.; Behura, Sanjay K.; Ikenbbery, Myles A.; Moore, David; Hohn, Keith and Berry, Vikas, "Introduction of protonated sites on exfoliated, large-area sheets of Hexagonal Boron Nitride", ACS Nano, DOI: 10.1021/acsnano.8b03651, Sep. 2018. en_US
dc.identifier.issn 1936-0851, 1936-086X
dc.identifier.uri https://doi.org/10.1021/acsnano.8b03651
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/3916
dc.description.abstract Hexagonal boron nitride (h-BN) sheets possess an exclusive set of properties, including wide energy band gap, high optical transparency, high dielectric breakdown strength, high thermal conductivity, UV cathodoluminescence, and pronounced thermochemical stability. However, functionalization of large h-BN layers has remained a challenge due to their chemical resistance and unavailable molecular-binding sites. Here we report on the protonation of h-BN via treatment with chlorosulfonic acid that not only exfoliates “large” h-BNs (up to 10 000 μm2) at high yields (∼23%) but also results in their covalent functionalization by introducing four forms of aminated nitrogen (N) sites within the h-BN lattice: sp2-delocalized and sp3-quaternary protonation on internal N sites (>N+═ and >NH+−) and pyridinic-like protonation on the edge N sites (═NH+– and −NH−). The presence of these groups transforms the chemically passive h-BN sheets to their chemically active form, which as demonstrated here can be used as scaffolds for forming composites with plasmonic gold nanoparticles and organic dye molecules. The dispersion of h-BNs exhibits an optical energy band gap of 5.74 eV and a zeta potential of ζ = +36.25 mV at pH = 6.1 (ζmax = +150 mV), confirming high dispersion stability. We envision that these two-dimensional nanomaterials with an atomically packed honeycomb lattice and high-energy band gap will evolve next-generation applications in controlled-UV emission, atomic-tunneling-barrier devices, ultrathin controlled-permeability membranes, and thermochemically resistive transparent coatings.
dc.description.statementofresponsibility by Kabeer Jasuja, Kayum Ayinde, Christina L. Wilson, Sanjay K.Behura, Myles A.Ikenbbery, David Moore, Keith Hohn and Vikas Berry
dc.language.iso en en_US
dc.publisher American Chemical Society en_US
dc.subject Exfoliation en_US
dc.subject Functionalization en_US
dc.subject Hexagonal boron nitride en_US
dc.subject Protonation en_US
dc.subject Raman en_US
dc.title Introduction of protonated sites on exfoliated, large-area sheets of Hexagonal Boron Nitride en_US
dc.type Article en_US
dc.relation.journal ACS Nano


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